the field of medicine that specializes in the study of tumors. oncology. The branch of medicine that deals with the study and treatment of tumors.
Who are they? Millennials are currently aged 20-35, or born between 1980 and the end of 1994 (with some more generous definitions taking in those born up to 2000). They also get called Generation Y, because they follow on from Generation X (born 1965-1979), and other, less flattering names.
There are more 23-year-olds â 4.7 million of them â than any other age, according to census data from June. The second most populous age group was 24, and the third was 22. There is no official age range for millennials but the generation generally is defined as being born between the early 1980s and early 2000s. By 2020, they will account for one-third of the adult population. At the same time, millennials are the most educated generation in American history.